[Spinosaurus]

Why not simply prohibit cruise ships in the nearby port? That seems like a far, far easier solution if that is in fact the root cause of the problem.

[iav]

Cruise ship arrivals were only 7% of Venice visitors in 2018. They have already been diverted to a nearby industrial port since reopening after the pandemic

[ziofill]

It’s been advocated for many years, but the maritime transportation industry is very powerful in Italy.

[MattGaiser]

Presumably you want to discourage people who won’t spend as much. Cruises are costly.